Ignition device for internal-combustion engines



Feb. 12 1924.

H. C. KIRBY IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES Filed May 19, 1923 Patented Feb. 12, 1924.

UNITED STATES HARRY c. KIRBY, or Macon; GEORGIA.

IGNITION DEVICE Iron INTERNAL-COMBUSTION"ENGINES:

L Application filed May 19, 1923. Seria1 No. 640,029,-

T all whom it may concern:

Be it known that I, HARRY C. 'KIRBY, a citizen of the United States, residing at Macon, in'thecounty of Bibb and State of Georgia, have invented new and useful Improvements in Ignition Devices for Internal- Combustion Engines, of which the following is a specification.

The present invention relates to ignition devices for internal combustion engines, and

more particularly to spark plug attachments.

The object of the invention is to produce a spark plug attachment of simple and durable construction which has provisions for retarding the accumulation of deposit on the sparking terminals, for cleaningthe terminals when the accumulation of deposit thereon becomes excessive, and which is provided with devices for conveniently and efficiently priming the engine.

The invention will be particularly described by reference to the accompanying drawings, of which:

Figure 1 is a longitudinal or vertical section through a spark plug attachment embodying the present improvements; and Figure 2 is a transverse or horizontal section on the line 2-2 of Figure 1.

The drawings illustrate an attachment which comprises a nipple 10 having a threaded lower end adapted to be screwed into a threaded aperture formed in the head of the engine cylinder. The nipple has a bore providing a restricted passage between the cylinder and the chambered upper part of said nipple. For example, where the attachment is designed for use with a Ford engine, which has a cylinder bore of 3 inches, this restricted passage should have a diameter of about inch. The bore of the nipple communicates at its upper end with a chamber of larger diameter, and a spark plug 11 is screwed into a threaded boss formed in the wall of this chamber, the axis of said boss and plug extending at an angle of about 15 to the axis of the attachment. The chamber is also provided with an inclined partition 12, which has a passage 13 disposed out of vertical alignment with the bore of the nipple. Screwed in the upper end of the nipple is a thimble 14 into which is screwed the neck of a priming cup 15. A manually operabl valve 16 controls communication of the priming cup with the nipple. The wall of the nipple chamber directly below the spark terminals is slightly bulged downwardly at 17 to provide a chamber or pocket for holding gasolene admitted for priming. A small aperture normally closed by a screw plug 18' is formed in the side wall of this pocket for a purpose which will be hereinafter described.

In the attachment described, the sparking terminals are well protected from contact with any oil which may be blown up through the'nipple 10, and the accumulation of deposit thereon is very greatly retarded from what it would be were the sparking terminals directly exposed to the explosive charges, as customary. Any oil which is blown up through the nipple is defiectedand thrown back by the inclined partition 12,

and thus preventedfrom decomposing adjacent said terminals".

= The attachment provides a very convenient and efficient priming means for the engine when cold. For this purpose, gasolene is poured into the cup 15 and permitted to flow into the nipple chamber by opening valve 16, the gasolene falling on the partition 12 and flowing down into bowl 17 directly under the sparking points.

Even with the protecting provisions of the attachment described, the sparking terminals after a time accumulate an excessive deposit of soot or carbon. The present invention provides a ready means for cleaning the said terminals without the necessity of unscrewing the plug. To clean the sparking points, it is only necessary to unscrew the plug 18, start the motor and let it run for ten or fifteen minutes. The explosions cause the gases to be forced up through the nipple, through the opening 13 and thence past the sparking points and out through the aperture normally closed by plug 18. The rush of gases past the sparking points is sufficient to blow ofi" the accumulation of carbon.

Now having particularly described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. An ignition device for internal combustion engines, comprising a nipple adapted to be attached to a cylinder head and having a restricted passage adapted to communicate with the interior of the cylinder, and having a chamber provided with an inclined partition extending over said passage provided with an opening therethrough adjacent its upper end out of alignment with said passage, a spark plug attached to said nipple and extending into said chamber above said partition, said chamber being formed with a pocket directly below the terminals of said plug, and a screw plug in the side of said pocket normally closing a vent below said terminals-- 2. An ignition device for internal combustion engines, comprising a nipple adapted to be attached to a cylinder head and having a restricted passage adapted to commu nicate with the interior of the cylinder and having a chamber provided with an inclined partition extending? over said passage provided with an openingtherethrough adjacent its upper end out of alignmentwith said passage, a spark plugattached to said nipple extending into said chamber" above said: partition, and a screw plug in the sideof said chamber normally closing a vent below the sparking terminals.

3. An ignition device for internal combustion engines, comprising a nipple adapted to be attached to a cylinder head and having a restricted passage adapted to communicate with the interior of the cylinder and having a chamber provided with an inclined partition extending over said passage provided with an opening therethrough adjacent its upper endout of alignment with said passage, a spark plug attached to said nipple extending into said chamber above said partition, said chamber being formed with a pocket at the lower end of said partition, and a priming cup attached to said nipple adapted to-admit gasolene on to said partition.

at.- An ignition device for internal com-, bustion engines comprising a nipple adapted to be attached to the cylinder" head and havinga restricted passage adapted to coinmunicate with: the interior of the cylinder and having a: chamber provided with an inclined partition extending over said passage provided with an openingout of alignment with said passage, a spark plug attached to said nipple and extending into said; chamber above said partition, said chamber-being formed with a pocket at the lower endv of said partition and directly below the terminals of said plug, a priming cup attached to the upper'en'd of said nipple and provided with a manually operable valve controlling communication thereof with the said chamber, and a screw plug. in the side of said pocket.

In testimony whereof I hereunto affix my signature;

HARRY KI'RB Y. 

